Now that the supposed Brain Surgeon is out of the picture and Vogel feels safe again, she decides to take on a new client. She asks Dexter to come to her before doing anything rash regarding his personal hunt for Zach. He needs solid proof before putting Zach on his table -- that's part of the code -- so proof he shall find.
At a second crime scene, Dexter spots Zach lurking about with his giant camera. Seizing an opportunity, he allows Zach to cross over the crime scene tape and photograph up close. Unable to keep his full composure, Zach comments how the scene is "amazing," prompting Dexter to think, "I remember that feeling -- awe, wonder -- it only fed the urge." It takes a serial killer to know a baby serial killer.
Unbeknownst to Dexter at the time, the two vigilantes were having a moment -- a "teaching moment." Dexter walks Zach through what happened at the scene by reading the blood spatter, which only encourages Zach to ask how the killer got caught. He's taking mental notes on what not to do.
Things are starting to get back into the usual rhythm. Part of the ebb and flow of Dexter's life -- aside from hunting killers and sharing steaks with Debra -- is keeping up a social life for appearance's sake. Following Jamie's advice, he meets up with Cassie for lunch at a food truck. It's been while since he's been with a normal girl, so things get awkward real fast. Poor Dexter cringes in his seat while trying to come up with normal responses to the typical first date questions. When Cassie asks what he does on his boat, he says, "I just take it out, turn around, and come back" -- very normal of you, Dex.
Enough with trying to blend in with society; it's time to be with your own kind, Dexter Morgan. And that's just what he does. Dexter goes to visit Zach at his photography office/studio, where the walls are covered with photographs of blood: "He treats the blood like a swimsuit model." Yet, sometimes being among others like yourself can get a little disturbing, especially when Zach says, "I forget it was a crime scene. I keep thinking that dead chick spilled all that blood just for me." Riiight.
Clearly the setup here is that Zach will be the new Dexter, but isn't he a little too old of a dog to be taught new tricks?